MAGETWO-81146: Fixing #10275 keyboard submit of adminhtml suggest form. #11250

 - Merge Pull Request #11250 from romainruaud/magento2:fix_admin-search-menu
 - Merged commits:
   1. eefdc1c
   2. 00afa44
   3. a0bef71

Author: ishakhsuvarov

lib/web/mage/backend/suggest.js

@@ -245,6 +245,7 @@
 
                         case keyCode.ENTER:
                         case keyCode.NUMPAD_ENTER:
+                            this._toggleEnter(event);
 
                             if (this.isDropdownShown() && this._focused) {
                                 this._proxyEvents(event);
@@ -314,6 +315,30 @@
             this._bindDropdown();
         },
 
+        /**
+         * @param {Object} event - event object
+         * @private
+         */
+        _toggleEnter: function (event) {
+            var suggestList,
+                activeItems,
+                selectedItem;
+
+            suggestList = $(event.currentTarget.parentNode).find('ul').first();
+            activeItems = suggestList.find('._active');
+
+            if (activeItems.length >= 0) {
+                selectedItem = activeItems.first();
+
+                if (selectedItem.find('a') && selectedItem.find('a').attr('href') !== undefined) {
+                    window.location = selectedItem.find('a').attr('href');
+                    event.preventDefault();
+
+                    return false;
+                }
+            }
+        },
+
         /**
          * @param {Object} e - event object
          * @private